709 research outputs found
Letter from Henry Takeuchi, Rohwer Incarceration Camp to Mr. [John Victor] Carson, Dominguez Estate Company, February 16, 1943
No full textAcknowledges letter from Carson, see Item csudh_rsp_701. Takeuchi confirms selling flumes and pipes and states that buildings were not sold to Farm Product Company. Letter refers to personal property, buildings on land to rent and an assumed current tenant, Julian Rodriguez who he believes still occupies a building. Letter also asks for Carson to check a garage to survey it's contents; a foreman will not let a Mr. Wright check the items. Takeuchi sketches buildings on the leased land for Mr. Carson's use
Yu Takeuchi
No full textYu Takeuchi is serving for JAXA since 2007 and currently working as Associate Senior Administrator at Management and Integration Department of Human Spaceflight Technology Directorate. He is also working as Researcher at the Institute of Space Law of Keio University. He received LL.M. degree from the Institute of Air and Space Law of McGill University in 2015. His main interest is in international space law inter alia the legal aspects of space traffic management and sustainable space development. He is a member of the Air Law Institute of Japan, Japanese Society of International Law, and the International Institute of Space Law (IISL).
Main Works Published in English
- “Toward the International Regime for Space Traffic Management -What to Fix the Current International Regulations-”, (November 5, 2014). Space Traffic Management Conference, Paper 23 (http://commons.erau.edu/stm/2014/wednesday/23).
- “Regulatory Regime for Tomorrow’s Suborbital Space Flights: Point-to-point International Flights”, 56th Colloquium on the Law of Outer Space, 2013.
- “Space Traffic Management as a Guiding Principle of the International Regime of Sustainable Space Activities,” 4 Journal of East Asia and International Law, 2011
- “Japanese Perspective on Legal Issues of Commercial Human Spaceflight” (co-author), 53rd Colloquium on the Law of Outer Space, 2011
- “Legal Points at Issue about NEO Threat Response and International Cooperation” (co-author), 28th International Symposium on Space Technology and Science, 2011
- “From Guideline to International Treaty for Rule of Law concerning Mitigation of Space Debris?” (co-author), 52nd Colloquium on the Law of Outer Space, 2010
Main Works Published in Japanese (title translated into English)
- “What is Space Traffic Management”, Vol. 46, No.9, Journal of the Japanese Institute of International Business Law, 2018.
- Soichiro Kozuka & Masahiko Sato eds., Introduction of Space Law for Entrepreneur (2nd. Ed.), Yuhikaku, 2018. (co-authored)
-“Challenges to International Space Law for Managing Space Traffic”, 55 Kuho (Air Law), 2014.
-“Legal Points as Issues of NEO Threat Response and International Cooperation” (co-author), 3 Spaceguard Research, Japan Spaceguard Association, 2011https://commons.erau.edu/stm-images/1121/thumbnail.jp
Total infrared luminosity estimation from local galaxies in AKARI all sky survey
No full textWe aim to use the a new and improved version of AKARI all sky survey catalogue of
far-infrared sources to recalibrate the formula to derive the total infrared luminosity.
We cross-match the faint source catalogue (FSC) of IRAS with the new AKARI-FIS and
obtained a sample of 2430 objects. Then we calculate the total infrared (TIR) luminosity
LTIR from the formula previously estimated
from IRAS data and compare it with total infrared luminosity from AKARI FIS bands to
obtain new coefficients for the general relation to convert FIR luminosity from AKARI
bands to the TIR luminosity
Radio emission from dusty galaxies observed by AKARI
No full textWe probe radio–infrared correlation for two samples of extragalactic sources from the local Universe from the AKARI All-Sky Catalogue. The first, smaller sample (1053 objects) was constructed by the cross-correlation of the AKARI/FIS All-Sky Survey Bright Source Catalogue, the AKARI IRC All-Sky Survey Point Source Catalogue and the NRAO VLA Sky Survey, i.e. it consists of sources detected in the mid- and far-infrared by AKARI, and at the 1.4 GHz radio frequency by NRAO. The second, larger sample (13,324 objects) was constructed by the cross-correlation of only the AKARI/FIS All-Sky Survey Bright Source Catalogue and the NRAO VLA Sky Survey, i.e. it consists of sources detected in the far-infrared and radio, without a condition to be detected in the mid-infrared. Additionally, all objects in both samples were identified as galaxies in the NED and/or SIMBAD databases, and a part of them is known to host active galactic nuclei (AGNs). For the present analysis, we have restricted our samples only to sources with known redshift z . In this paper, we analyse the far-infrared–radio correlation for both of these samples. We compare the ratio of infrared and radio emission from normal star-forming dusty galaxies and AGNs in both samples. For the smaller sample we obtained 〈_{qAGN} 〉=2.14 for AGNs and 〈_{qn} 〉=2.27 for normal galaxies, while for the larger sample 〈_{qAGN} 〉=2.15 for AGNs and 〈_{qn} 〉=2.22 for normal galaxies. An average value of the slope in both samples is 〈q〉~2.2, which is consistent with the previous measurements from the literature
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Hyper Suprime-Camera Survey of the Akari NEP Wide Field
No full textThe extragalactic background suggests half the energy generated by stars was reprocessed into the infrared (IR) by dust. At z ∼1.3, 90% of star formation is obscured by dust. To fully understand the cosmic star formation history, it is critical to investigate infrared emission. AKARI has made deep mid-IR observation using its continuous 9-band filters in the NEP field (5.4 deg2), using ∼10% of the entire pointed observations available throughout its lifetime. However, there remain 11,000 AKARI infrared sources undetected with the previous CFHT/Megacam imaging (r ∼25.9ABmag). Redshift and IR luminosity of these sources are unknown. These sources may contribute significantly to the cosmic star-formation rate density (CSFRD). For example, if they all lie at 1 z g, r, i, z, and y) using Hyper Suprime-Camera (HSC), which has 1.5 deg field of view in diameter on Subaru 8m telescope. This will provide photometric redshift information, and thereby IR luminosity for the previously-undetected 11,000 faint AKARI IR sources. Combined with AKARI's mid-IR AGN/SF diagnosis, and accurate mid-IR luminosity measurement, this will allow a complete census of cosmic star-formation/AGN accretion history obscured by dust
Letter from Dominguez Estate Company to Mr. F. [Fusaichi] Takeuchi, May 7, 1937
No full textLetter notifies Takeuchi of the company's required proof of citizenship for land lease holders. The company acknowledges the request is being sent to all Japanese tenants
Clustering of far-infrared galaxies in the AKARI All-Sky Survey North
No full textWe present the measurements of the angular two-point correlation function for AKARI 90- point sources, detected outside the Milky Way plane and other regions characterized by high Galactic extinction in the northern Galactic hemisphere, and categorized as extragalactic sources according to our far-infrared-color based criterion. Together with our previous work (Pollo et al., 2013) this is the first measurement of the large-scale angular clustering of galaxies selected in the far-infrared after IRAS. We present the first attempt to estimate the spatial clustering properties of AKARI All-Sky galaxies and we conclude that they are mostly a very nearby (z ≤ 0.1) population of moderately clustered galaxies. We measure their correlation length Mpc, which is consistent with the assumption that the FIS AKARI All-Sky surveys observes mostly a nearby star-forming population of galaxies
Letter from Dominguez Estate Company to Mr. F. [Fusaichi] Takeuchi, October 27, 1937
No full textDiscusses nearing lease expiration and new lease requiring signature. Refers to an increase in acreage due to recent survey showing an increase in land being farmed by Takeuchi. Requests signature and one-half year's rent payment in advance
Infrared luminosity functions of AKARI Sloan Digital Sky Survey galaxies
No full textBy cross-correlating AKARI all sky survey in 6 infrared (IR) bands (9, 18, 65, 90, 140, and 160μm) with the SDSS galaxies, we identified 2357 infrared galaxies with a spectroscopic redshift. This is not just one of the largest samples of local IR galaxies, but AKARI provides crucial FIR bands in accurately measuring galaxy SED across the peak of the dust emission at > 100μm. By fitting modern IR SED models to the AKARI photometry, we measured the total infrared luminosity (LIR) of individual galaxies.
Using this LIR, we constructed the luminosity functions of infrared galaxies at a median redshift of z=0.031. The LF agrees well with that at z=0.0082 (the RBGS), showing smooth and continuous evolution toward higher redshift LFs measured in the AKARI NEP deep field. By integrating the IR LF weighted by LIR, we measured the local cosmic IR luminosity density of IR= (3.8+5.8−1.2) × 108 L⊙Mpc−3.
We separate galaxies into AGN (active galactic nuclei), star-forming, and composite by using the [NII]/Hα vs [OIII]/Hβ line ratios. The fraction of AGN shows a continuous increase with increasing LIR from 25% to 90% at 9log LIR Hα and L[OIII] show good correlations with LIR for SFG (star-forming galaxies) and AGN, respectively. The self-absorption corrected Hα/Hβ ratio shows a weak increase with LIR with a substantial scatter. When we separate IR LFs into contributions from AGN and star-forming galaxies (SFG), the AGN contribution becomes dominant at LIR > 1011L⊙, coinciding the break of the both SFG and AGN IR LFs. At LIR ≤ 1011L⊙, SFG dominates IR LFs. Only 1.1±0.1% of Ω IR is produced by LIRG (LIR > 1011L⊙), and only 0.03±0.01% is by ULIRG (LIR > 1012L⊙) in the local Universe. Compared with high redshift results from the AKARI NEP deep survey, we observed a strong evolution of ΩSFGIR α(1+z)4.1±0.4 and ΩAGNIR α(1+z)4.1±0.5. Our results show all of our measured quantities (IR LFs, L∗, ΩAGNIR, ΩSFGIR) show smooth and steady increase from lower redshift (the RBGS) to higher redshift (the AKARI NEP deep survey)
Star formation and dust extinction properties of local galaxies as seen from AKARI and GALEX
No full textInternational audienceAn accurate estimation of the star formation-related properties of galaxies is crucial for understanding the evolution of galaxies. In galaxies, ultraviolet (UV) light emitted by recently formed massive stars is attenuated by dust, which is also produced by star formation (SF) activity, and is re-emitted at mid-and far-infrared (IR) wavelengths. In this study, we investigate the star formation rate (SFR) and dust extinction using UV and IR data. We selected local galaxies which are detected at AKARI FIS 90 mu m and matched the IRAS IIFSCz 60 mu m select catalog. We measured FUV and NUV flux densities from GALEX images. We examined the SF and extinction of Local galaxies using four bands of AKARI. Then, we calculated FUV and total IR luminosities, and obtained the SF luminosity, L-SF, the total luminosity related to star formation activity, and the SFR. We find that in most galaxies, L-SF is dominated by L-dust. We also find that galaxies with higher SF activity have a higher fraction of their SF hidden by dust. In fact, the SF of galaxies with SFRs \textgreater 20 M-circle dot yr(-1) is almost completely hidden by dust. Our results boast a significantly higher precision with respect to previously published works, due to the use of much larger object samples from the AKARI and GALEX all sky surveys
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